The Necessity of Establishing a Regional Marine Research Program for the U.S. West Coast

The welfare of the marine environment of the U.S. West Coast of California, Oregon, and Washington is hindered by insufficient understanding of ecosystem dynamics and human pressures. Greater coordination, integration, and support of mutually identified research priorities across research organizations on the West Coast are necessary. This level of collaboration is essential to responding to regional ecosystem threats, such as the impacts of human occupation of coastal areas, over-harvesting of marine resources, and climate change. To address this need for collaboration and build on the accomplishments of existing research organizations, this article advocates the establishment of a West Coast regional marine research program (RMRP).     

能效设计指数EEDI功率曲线的直接计算方法

船舶能效规则强制生效后，所有适用船舶必须满足Attained EEDI≤Requied EEDI的条件，因此准确估算或预报功率曲线从而计算得到Attained EEDI将对适用船型具有极为重要的意义。根据国内外关于功率-转速-航速预报的最新进展，依据螺旋桨敞水性能图谱，采用KT/J^2系数，给出了功率曲线的直接计算方法，经实际算例验证，该方法相对传统的间接计算方法更为清晰简便，且结果准确可靠。     

永吉高速公路桥梁设计探讨

结合永吉高速公路桥梁特点,详细介绍山区高速公路桥梁的结构设计,上、下部构造宜采用的型式以及桥梁设计的一般原则,可为相关项目设计提供参考.     

大跨径拱桥承载力设计要点探究

结合贵州遵义大跨径拱桥的工程实例，对大跨径拱桥承载输水管道时的设计要点进行探析，希望能为同类工程提供参考和借鉴。     

艰险山区铁路西安至成都客运专线陕西境内段综合选线设计

针对铁路选线设计是项目前期研究的难点和重点,直接关系到项目建设的经济性及可靠性,考虑国内新建铁路的设计需要,结合西成客运专线沿线特点,有针对性地从满足复杂地形、地质、环保及安全等需要,综合分析选线设计中的重、难点,提出选线设计的原则、方法以及体会,对类似铁路选线设计提供参考。     

板式橡胶支座的设计与应用

针对桥梁结构中经常使用的板式橡胶支座的工作原理进行了简单分析,阐述了选用原则,并通过算例详细介绍了板式橡胶支座的设计内容。     

橡胶沥青洒布车的研究及应用

针对橡胶沥青性能稳定，却由于缺乏配套的施工设备而无法在公路工程中广泛应用的现状，对橡胶沥青洒布车的设计、开发及工程应用等方面进行研究分析，最终得出：橡胶沥青洒布设备有利于橡胶沥青在公路工程中的应用推广。     

Liner ship route schedule design with port time windows

This paper examines a practical tactical liner ship route schedule design problem, which is the determination of the arrival and departure time at each port of call on the ship route. When designing the schedule, the availability of each port in a week, i.e., port time window, is incorporated. As a result, the designed schedule can be applied in practice without or with only minimum revisions. This problem is formulated as a mixed-integer nonlinear nonconvex optimization model. In view of the problem structure, an efficient holistic solution approach is proposed to obtain global optimal solution. The proposed solution method is applied to a trans-Atlantic ship route. The results demonstrate that the port time windows, port handling efficiency, bunker price and unit inventory cost all affect the total cost of a ship route, the optimal number of ships to deploy, and the optimal schedule.     

公路桥梁小跨径矮T梁设计探讨

对公路桥梁小跨径桥梁上部结构现状进行分析，针对矮T梁的提出背景、设计要点、构造要求、具体应用及造价情况进行简要的论述探讨，并对应用前景进行展望。     

新建安九铁路鳊鱼洲长江大桥总体设计

新建安九铁路鳊鱼洲长江大桥采用两线350 km/h高铁及两线200 km/h客货共线标准建设。南汊航道桥采用主跨672 m双塔钢箱混合梁交叉索斜拉桥,北汊航道桥采用主跨2×140 m独塔竖琴式预应力混凝土梁斜拉桥,鳊鱼洲及北汊非通航孔区采用48 m简支梁桥,跨北岸大堤采用主跨100 m变高连续梁桥,南、北岸引桥除连续梁外均采用32 m、24 m铁路标准梁,基础均采用桩基础。其中南、北汊航道桥采用整幅修建,其余采用分幅修建。桥址区基岩为灰岩,岩溶发育,设计采用了预注浆及抛填片石粘土法或灌注低标号片石混凝土措施进行处理。